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FC200 OPEN CHANNEL FLOW MONITOR
Take Open Channel Flow Measurement and meter total flows
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FEATURES:
- Digital LCD screen
- Easy-to-use interface with user selectable flow tables
- Highly accurate depth probe
- Output signal for recorders or displays
- Sampler triggering output
- Water resistant enclosure
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Open Channel Flow Monitor Product Description
Global Water's Open Channel Flow Monitor is reliable and
accurate for measuring and totalizing open channel flows for all flumes and weirs, as well as for any
gravity-type open-channel flow application. The flow meter measures water depth with Global
Water's highly accurate pressure transducer, and the unit's electronic
circuitry instantly calculates and displays water flow and totalizer values for any depth-to-flow
relationship in any engineering units. The Open Channel Flow Monitor is easy to set up in the
field using a unique four-button programming system.
Open Channel Flows
For any open channel that is free flowing, there is a specific relationship between depth of water and
flow rate. Whenever a given depth occurs, there will always be the same flow. Therefore,
if the flow rate is known for each depth, a depth-to-flow relationship can be constructed. The
Open Channel Flow Monitor is pre-programmed with depth-to-flow relationship tables. When the
user digitally selects the correct depth-to-flow relationship for an application, the Open Channel Flow
Monitor's LCD screen automatically displays accurate flow rate measurements for any depth that is
reached. This water flow is averaged over time to display total flow.
When using a primary device to measure flow, such as a measuring flume or weir, there is a mathematical
relationship between depth and flow. When measuring flow in a channel that does not have a
primary device, the depth-to-flow table can be constructed by measuring the flow at several different
depths, using Global Water's Flow Probe.
Depth Measurement
Global Water's Open Channel Flow Monitor measures flow depth with the highly-accurate
WL400 Water Level Sensor, which is a fully submersible water level
sensor constructed of stainless steel. The standard level range is from 0 to 3' of water, which
provides for accurate flow measurements even with a depth change as small as a fraction of an
inch. The pressure transducer is mounted slightly below the "zero" flow depth of the
channel, upstream from the throat of the flume or weir. For open channels with no primary
device, the sensor is mounted below the lowest expected water depth. The water level sensor
has a 2-wire 4-20 mA signal, so the flow computer can be mounted several hundred feet away, if
required. The sensor and computer can be connected with standard, twisted-pair signal wire.
Global Water also offers an ultrasonic water level sensor that allows the Open Channel Flow Monitor
to measure semi-solid flows or flows that are not suitable for a standard submersible pressure
transducer. Global Water recommends that the ultrasonic sensor option only be used in areas
where AC power is available. You should strongly consider using a submersible pressure
transducer for applications that are in areas without AC power.
Display and Outputs
The Open Channel Flow Monitor displays flow rate on a large 6-digit LCD screen. The totalized
output is shown on a second LCD display. The display reads in user-defined units of flow,
including mgd, csf, gpm, m3s.
The Flow Monitor also produces an analog 4-20 mA output signal that is proportional to flow. This
can be used for chart recorders, dataloggers, or as an input to telemetry or process control
systems. In addition, the meter has a flow-proportional output signal for triggering
water samplers.
Digital Flow Computer
The Global Water Open Channel Flow Monitor has powerful internal electronic circuitry that calculates
and totalizes flow. Desired engineering units and depth-flow relationships (from over 20
pre-defined tables) can easily be selected using the unit's four front panel push buttons. User
programming does not require the unit's enclosure to be opened. The unit's manual includes
programming information, including depth-to-flow tables for all standard flumes and weirs.
Enclosure
The enclosure is made of weatherproof injection molded plastic. It is suitable for use in a wide
variety of environments. The enclosure can be wall-mounted and fitted with conduit for sensor and
power connections, if required.
Open Channel Flow Monitor Specifications
Rate Display: 6 digit + decimal place, LCD
Totalizer Display: 6 digit + decimal place, LCD
Accuracy: Pressure transducer: +0.2% FS + Flow Monitor: +0.01% + the depth-flow-table error
Flow Units: CFS, GPM, m3s, MGD
Totalizer: Related to Flow Units
Enclosure: 4 3/4" W x 8" H x 3" D, NEMA 4X (IP67)
Power: 120 VAC to 240 VAC, optional: Battery powered (Must be specified at time of ordering)
Current Draw: 50mA Typical, 16mA in sleep mode, and 120mA when the output relays are on
Pre-defined Tables
Parshall: 1", 2", 3", 6", 9", 12"
Palmer-Bowlus (4D): 4", 6", 8", 10", 12", 15"
Weir: 45° V notch, 90° V notch, 1' rectangular, 2' rectangular
H: 0.4HS, 0.6HS, 0.5H, 0.75H, 1.0H, 1.5H, 2.0H
Trapezoidal: 60°
Custom Table
You must provide Global Water with a depth to flow equation or look up table at time of order. Please
allow for longer lead times.
Open Channel Flow Monitor Options & Prices
FC200 Open Channel Flow Monitor
0-3' Depth Sensor on 25' of cable included. Please specify flume/weir type when placing order.
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$1,495 |
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FC200-U Open Channel Flow Monitor
0.17’ to 1.00’ ultrasonic sensor on 10' of cable included (for use with AC power only). Please specify flume/weir type when placing order.
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$1,600 |
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FC200-D Open Channel Flow Monitor Datalogging Option
0-3' Depth Sensor on 25' of cable included. Please specify flume/weir type when placing order. Includes
internal GL500S-2-1 serial datalogger.
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$1,760 |
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FCBAT Battery Option
Includes Heavy-Duty Weather Resistant Environmental Enclosure and 12V, 4.5Ah rechargable battery.
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$185 |
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PDAGL500 Deluxe PDA Package
Handheld PDA download package for GL500.
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$675 |
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RELATED PRODUCTS
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FC200-S Sewer Flow Monitor
0-3' Depth Sensor on 25' of cable included. Please specify correct sewer flow table when placing order.
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$1,600 |
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FL16 Water Flow Logger
The Water Flow Logger revolutionizes flow data collection for applications such as inflow & infiltration studies,
stormwater and wastewater collection systems, open channels and a host of other gravity flow systems.
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$940 |
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Parshall flume
Industry standard rectangular flume used to monitor streams and channels.
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$Varies |
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Palmer-Bowlus Flume
U shaped channel flume specifically designed for monitoring flows in pipes.
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$Varies |
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H flume
Used to monitor free fall outflow from pipes or channels when a Palmer-Bowlus or Parshall Flume will not work.
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$Varies |
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GL500 Open Channel Flow Recorder
Open channel flow recorder for sensor datalogging. Includes Global Logger Software. With weather proof enclosure and 12V battery.
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$805
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FSS-STD Flow Sampling System
A unique combination of products that makes monitoring, sampling, and recording stormwater
or industrial discharge water flows easy.
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$3,425 |
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WL700 Ultrasonic Water Level Sensor
Specify Water Level Range: 1', 3', 6'. Includes 10' cable.
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$595 |
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FP101 Flow Probe
Water velocity probe for determining open channel flow.
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$730 |
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